Automobile-muffler.



C. G. BOECK AUTOMOBILE MUFFLER. y APPLICATION FILED 1111.11, 1911. RENEWED APR. s. 1912.

Patented Nov` 12, 1912.

a citizen of the United iisV UNITED STATES iii/fumare @our PATENT Corrieri.

CHARLES G. BOECK, 0F JACKSON, MICHIGAN, ASSIGNOB T0 NOVELTY MANUFACTURING u C0., 0F JACKSON, MICHIGAN,

A CORPORATION OF MICHIGAN.

AUTOMOBILE-KHLER.

Application tiled July 1,

To all who-m it lmay concern;

Be it known that I,

CHARLES G. Boron, States, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain newand useful Improvements in Automobile-Mulders, of which the following is a specification. This invention relates to muiilers employed to deaden. and destroy vthe sound caused by the' exhaust of explosive engines andintended more particularly for use on* automobiles.

The invention relates particularly to that type of mutiler which comprisesa cylindrical casing and a core of bales within the casing.

The objects of the present invention are to provide means gases positively into the core a d to prevent accumulation of the sameA at t e Inlet end of the. casing; to prolorg the circulationof 'the gases within the mu er so that they will be fully spent prior to their discharge; and to improve the construction generally with a resultantincrease in eiciency.

The invention is hereinafter frstfully described and itsA novel features particularly pointed outA in the claims at the end ofthe escription.

In the annexed drawings, which are to be the casing in longitu mal section and show A' ing the core partly in elevation and p artly broken away and in section. Fig. 2 is an enlarged section taken on the line 2--2 of Fig. 1. Figs. 3, 4, 5 and 6 are transverse sections taken, respectivei. Y, on 4-4, 5-5, and 6 6, o ig. 1. Fig. 7 is a detail section taken on the line 7-7 of Fig. (.5.

The casing comprises an inner cylinder -or tube 1' and an outer cylinder or tube 2. T he inlet end of the inner tube is adaptedto tit over the end of the exhaust pipe from the engine, indicated at 3, and 1s secured thereon by a clamp 4, a cut-out valve 5 being located on the wall or shell of the tube adjacent the inlet end thereof. Outlet openings 6 are provided in the shell of the inner tube, said openings being arranged remote fron the inlet end of the tube and extending to the opposite end thereof. The outer tube 2 is arranged concentric with and spaced from the inner tube and is arranged to 1nclose the outlet openings G of the inner tube.

Specication of Letters Patent.

for directing the exhaust 4 tube from the exhaust pipe are given a tortuous circulation within the tube by-a core i Patented Nov. .12, 1912.

1911, Serial No. 636,522. Renewed April 6, 1912. Serial ilo. 689,642.

a collar 7 which extends over the end therevof and is provided with .a central ring or flange 8 which fits snugly around the inner tube'so as to form an air-tight joint therewith The outer tube projects beyond the rear end of the inner tube and its own rear end is closed by a cap 9 securedthereto. A discharge tube or spout 10 extends through or rear end of this spout being enerally turned downwardly so a-s to direct t e esca ing towardthe ground. It will read' y-noted that the travel ofthe automobile will create a suction through this discharge spout so that the gases will be drawn through the same in a thm stream. j'

The exhaust gases received by the'innr consisting of a series of longitudinal b atlles L 11 and, to preventthe gases from passing directly through the casing," a closure 12 is provided for'the rear end of the inner tube. In the presentinstanee, the closure is a disk or capA secured to therear ends of the baes and. havingan annular axial flangel 13 adapted to fit snugly within the ;d of the while, at the same time permitting its ready removal when repairing or cleaningof the parts is necessary. The bales are provided at. their rear ends with tongues 14 which extend through slots in the disk cap 12 and are bent against. the outer face of the disk, being secured rigidly thereto by rivets or similar fastenings 15, as clearly shown in F' ,6- and `7. To the front ends of the ba esj-is secured a closure 16 which fits snuglyJ within the tube 1 and, asl shown most clearly' in" Fig. 3, leaves the space between the front ends of two of the battles unbrdged. thereby providing an entrance 17 to admit the gases to the core. To direct the gases positively to this entrance and prevent their accumulation in the tube lat one side of the entrance, I provide a guide, deiiector or hopper 18 in the form of a flaring funnellike plate secured in the V-shaped opening 17 and extending therefrom to the side of the tube. It will be noted that the free end of this plate tits close to the concavel surface of the casing and etectually cutsof the corner formed between the casing and the cap 16 so that the gases cannot accumulate therein, but will be caused to flow directly and is secured firmly to the cap 9, the outerv tube and thereby hold the core in place it Ye entrance directly to the Outlets. T he re#y maiiiing battles are each provided at o ne end with a plurality of perforations 'l 9said.peifelations-being located at opposite ends of 1o alternate battles whereby the gases are caused to follow a tortuous path back and forth and around the core s'o that they Will gradually lose their' force before passing through the -outlets 6. After passing 154 through said outlets the gases may further expand in the outer tube4 ,so that when they finally einei'ge from the spout 10 they will have lost practically all their tension and their escape to. the outerair will be noise- A .20. less. Giving to the tortuous circulation of the gases, the'decrease in their tension willbe gradual sothat no back pressure on the engine will be created.

The device .is simple in construction and 2:3 elicient in operation. It may be produced at a low cost Aand the parts niay be readily assembled and disassembled.

Having described my invention, what I claim and desire to secure by Letters Patent 1f A muliler comprising an inner tube adapted to be securedon an engineexhaust pipe and having an inlet to f ieceive gases directly from said pipe and an outlet distant from saidinlet, an otiter tube encircling the` inner tube and having. an air-tight connection therewith in advance of said outlet, a discharge leading from the outer tube, and inea-ns iii the inner tube for effecting a tor- 40 tuous circulation of the exhaust gases between the inlet and outlet of said inner tube. A inulller comprising an inner tube adapted to ,be secured on -`an engine exhaust pipe and having an inlet to receive gases di- 55 rectly from said pipe and an outlet distant from said inlet, an outer tube yencirclin the inner tube over said outlet and'` spaced t ere- -from, a discharge leading from?` the outer tube, and means in theiinicr tube for eiectinga tortuous circula-tion'of the exhaust gases within said tube.

mutiier comprising an inner tube having an inlet at one end and an outlet distant from the inlet, an outer tube concentric with and spaced from the inner tube and extendii'ig over the outlet therein, said outer tube having an air-tight connection at its front end with the inner tube and having its rear end projecting beyond the reai' end of the inner tube, a discharge spout at the rear end of-the outer tube, and means in the inner tube for effecting a tortiious circulation of the exhaust gases.

L A niulller casing coii'iprising an inner tube adapted to be secured upon the end of an engine exhaust pipe and having an outlet remote troni said pipe, an outer tube encircling the inner tube over said outlet, a cap closing the frontend of the outer tube and fitting snugly around the inner tube, a cap closing thereair end ofthe outer tube, and a discharge sp'out projecting from said cap..

In a .niuileigthe combination with a tubular casing, of a core of batlies therein having an entrance for gases in its front end, and a deflector extending from the said entrance in the core to the side of the casino'.

-6. In a mntller, the combination with a tubular casing, of a core of baffles therein having a `V-shaped entrance for gases in its front eudaiid a concave deflector plate secured to the core and extending from said entrance to the side of the casing.

7. Ina inutiler, the combination of a tube, a core of longitudinal battles tlieiein, a cap constituting a closure for the rear end of the t. uhe,'and tongues on t-lie rear ends of .the battles inserted through and secured to the said cap.

In testimony whereof I affix i'ny signature, in presence of two witnesses.

CHARLES G. Bonoit. 

